Umm....I think I screwed up

Hello, I am really new to the whole attachment theory thing. But I desperately need someone to talk to about this. I have read as much as I could on it in the past few days. I have discovered that I'm an Anxious Avoidant person. Well the reason I am posting on here is about two months ago I met the sweetest, most beautiful woman I have ever been around. I'm in a really bad spot in my life, I lost my job, my place to live, and I'm stuck living at home. I have been drinking a lot and typically at the end of the night I would go to this Denny's style restaurant near my Mom's place and just sit for hours drinking coffee and sobering up. Well this amazing looking waitress kept coming over and talking to me. I just thought she felt sorry for me but one night she slipped me her phone number with the check. And I was like wow, this is the best thing that has happened to me in forever. So we go out on a couple of amazing dates, get sloshed drunk on a few, sober on others have amazing sex. And in short order I'm like would you be my girlfriend...she's like absolutely! Now, I told her about my living and employment situation. And I tell her upfront that yes I'm very clingy, I take medication for severe depression anxiety, and complex PTSD (I was married to a Borderline for 13 years who made my life a living hell). I tell her look we can just keep having fun or I can flip the switch and you will get the love bombing of a lifetime...the choice is yours. She says yes I'm all in, no one has ever made me feel this way, your my missing half. We even started to drop the L word on occasion. The only two things I tell her are don't lie to me and don't cheat on me. That's it...those are literally the only two things that are just a complete no go with me. I told her I would do my best to not be to clingy but even one white lie will cause me to get nuts with wanting to invade her space. She was like yeah no problem. She tells me all her ex's cheated on her and she DOES NOT CHEAT. I explain to her that I've been cheated on by every girlfriend and my ex wife....I can't handle dishonesty and cheating...so everything is going good for like three weeks, we are spending time together and having the just an amazing time. Sex just keeps getting better and better. Then one day we are watching a movie on her phone, and these texts just keep coming in. At first I was like that's annoying, but then I start to pay attention to what they are saying. They are from this guy Bill...Bill wants to know if they can meet up in the morning. Bill starts talking about this friend of his that lives next to my Exes apartment....Bill Bill Bill....so I ask her...I'm like darlin, who is Bill, how does he know your work schedule and where your friend lives. She gets this real panicked look on her face and says, oh yeah he is this guy I went to high school with that I ran into at the gas station the other day. Oh and I ran into him at the bar the night before last and we drank together...so I'm like, well that's odd cause the night before last you said you were at work. She goes well I got the night off, sorry forgot to tell you...she is super nervous and won't look me in the eye. My alarm bells just start ringing in my gut and in my brain, going WTF? So she led to me AND went to the bar with another guy that she hasn't talked to in a decade. So I just kind of let it go that night and went home...so a few days later she brings dinner to my Mom's, stays for a few hours plays with my youngest son...then goes out to her truck comes in and makes a big production about work calling her in...now maybe I'm paranoid, but she is acting kind of weird about it. She is real loud and I'm like ok well don't go to it if it's such short notice, just stay here or go to the bar with your friends...she's like well I gotta go gonna go drink with some friends. She takes off...I get this bad feeling when she leaves that something just wasn't right. So I text her and I'm like so what are you doing, and she is like drinking at a friend's...now normally when she does things with friends she will say things like with so and so my friend. So I asked again, what friend and she starts freaking out saying I love you, you make me happy and I don't want to screw this up...I'm at Bill's. So I say listen, your an adult, you can drink with whoever you want to, but I am extremely uncomfortable with Bill, I don't know him, you just ran into him at a gas station there is something off about this but it's your choice. So I let it go, explained to her in person the next day that this was not something that I felt alright with and my anxiety started to go through the roof...I could tell something was just off. She swears up and down, he is just a friend. So right around this time I go over to her house and she mentions that she is a dismissive avoident...I have no idea what that means. She mentioned that she has been on lots of first and second dates, has sex then never calls them again and that I'm like her fitrst real attempt at real dating in like seven years. She also mentions having gotten so depressed that she didn't want sex of any kind even masturbating for a while and that she just is coming out of this in like the last year...now I may not sound very smart in this post here but I've done a lot of research on personality disorders do to my ex wife, and what my ex described is something called sexual anorexia, which means looooonnngggg spells of not even wanting sex that go into bingeing type behavior with lots of casual partners...so again alarm bells going off in my head. A few more weeks go by and I notice she is on Facebook all the time and Bill is tagging her in EVERY message. She is spending less time with me, less time texting me but is always talking to Bill on Messenger. Then about a week and a half ago, we get in our first semi fight. I went to a party on Friday night while she is at work, go home early Saturday morning wake up Saturday afternoon. First thing I do is text her. All I get back are very Curt, short replys and then finally a had a really bad night, really bad morning not sociable...now me being the idiot that I am, track her down in the parking lot at her gym, try and talk to her in her truck and I see a side of her I have never seen before. Daggers and hellfire blasting out of her eyes, she was so pissed that I wanted to comfort her...I say some dumb shit like hey, I'm just trying to be here. If you've had a rough night I'm here to talk...she was just like get out...for the next two days we texted a little...she seemed raging pissed still. She finally let's loose that basically a bunch of stuff happened Friday night at her work, and then Saturday morning with her roommate, she hasn't really slept in a few days. I say something like well why didn't you say so you could have stayed with me...she freaks out and says that because I didn't call or text Friday night she didn't bother even trying to get a hold of me and that she now knows she can't count on me. I try and talk to her but she just says come over in the morning and we will talk then. So I come over and the first thing she says is I have plans tonight to go to a movie with her gay friend. I was like, didn't ask but ok. Then we go in her house and I hold her while she sleeps for like six hours. She gets up, I ask, hey are we ok and she just says yeah, everything is fine...she needs to go back to bed. So I'm like ok talk to you later. So I leave and instantly her messenger icon pops up, she is online...I'm like ok whatever...so like for three hours she is online. I finally send a text and another message saying hey are you there, would like to come over in the morning. Three more hours go by, she is typing away finally gets back to me, no don't come over in the morning we can hang in the afternoon. Now my alarm bells are ringing again, she just ignored me for six straight hours to talk to Bill. Bill lives at the end of my street, so I get in my car and see him leaving his house all dressed up...and I resist the urge to follow him because even going as far as I did felt like it was too much. The next day I get up leave my house at ten, and there is her truck parked at Bill's, clearly had been there all night. So I try calling her, then I put a note on her windshield that says, we are done, hope you and Bill are happy. She texts me an hour later after finding the note and noticing I pulled her pictures off my Facebook and unfriending her. She says I didn't cheat and your just jumping to conclusions...I answered back in a very long winded text that she talks to him all the time, he posts about her all the time sometimes mentioning meet ups they have that I didn't know about, I had made my feelings crystal clear on multiple occasions that I didn't like the way he was always around her like a vulture. She liked to me about where she was going, who she was going with and then stayed the night with the guy. All she could say was nothing happened and that I was the one that makes her happy...didn't address any of my questions. So I reitterated that I had made it clear that I can't deal with dihonesty...I laid out three simple questions of why did she stay with him, why did she always lie to be with him and why did she always text him and ignore me...all she would say was I'm sorry. Then five hours later her truck was right back at Bill's and she stays every night...funny note here, this past weekend while Bill was at work I saw her in the passenger seat of her truck with some other guy driving laughing and giving the guy the eyes she used to give me....so that's my narrative, here is my questions. Now that I've read about my attachment disorder, I'm anxious, and she fits the bill completely with all her past statements for dismissive, did I make the right call ending it? Now that I've read this stuff I feel like I mishandled our time together, that I could have approached our communication differently. I definitely feel bad about how I handled the break up. But I just can't stomach dishonesty at that level. I know she cheated but I still feel like I mishandled the whole thing. And I miss her all the time, especially because I have to see her truck everyday. My friends talked me out of trying to talk to her the other day...but I just want to know why she cheated...we were doing amazing, and up until the texts I had no anxiety about the relationship or her and I had really toned back any clinging behaviors. I know I had to stand up for myself but why do I still feel like I let something beautiful slip through my fingers....did I miss read this whole thing because of anxiety?